Exemplo onde se aplica o uso de um Builder?

InscricaoService.cs

namespace Saegrn.Domain.Services
{
    public class InscricaoService : IInscricaoService
    {
        #region Properties
        private IInscricaoRepository _inscricaoRepository;
        private IUsuarioService _usuarioService;
        private IOfertaService _ofertaService;
        #endregion

        #region Ctor
        public InscricaoService(IInscricaoRepository inscricaoRepository, IUsuarioService usuarioService, IOfertaService ofertaService)
        {
            this._inscricaoRepository = inscricaoRepository;
            this._usuarioService = usuarioService;
            this._ofertaService = ofertaService;
        }
        #endregion

        #region Methods
        public void Criar(Guid loginId, string cpf, Guid ofertaId, string justificativa, bool correlacaoAtividades)
        {
            Usuario usuario = this._usuarioService.Verificar(loginId, cpf);
            Oferta oferta = this._ofertaService.GetPorId(ofertaId);
            
            if (oferta == null || usuario == null)
                throw new InvalidOperationException(Errors.InvalidInscription);

            AssertionConcern.AssertArgumentFalse(oferta.Cancelado, Errors.AlreadyCancelOffer);
            DateTimeAssertionConcern.GreaterThanCurrentDate(oferta.DataFimInscricao, Errors.InvalidSeasonInscription);

            Inscricao inscricao = new Inscricao(justificativa, oferta.Id, usuario.Id);
            inscricao.SetDataInscricao(DateTime.Now);
            inscricao.SetCorrelacaoAtividades(correlacaoAtividades);
            inscricao.Validar();

            this._inscricaoRepository.Create(inscricao);
        }
        #endregion
    }
}